Pregnancy dreams??

Hi can anyone help with my dreams please.
I'm 4mts pregnant and have been having really upsetting dreams about my partner. The first dream was when i was in my late granmothers house in dublin and my partner and i had been out in a pub or club and this girl started chatting him up, while i was talking to a friend. I went over and said leave him alone, he is taken and he is my fiance. The girl was not going to give up and kept talking to him and eventually he left with her. It was really strange though because first it was my partner and it later turned into a guy i was with a long time ago. Finally i was back in my grans house and he came back after me and said he was leaving me and that was it even though i was carring his child and he just left with this girl.
The next dream i had was i got a phone call from my partner and he said he was leaving me and it didn't matter about the baby, he just didn't want to be with me anymore. Again this was very upsetting.
Then yesterday we had a huge row for realand it almost came to us splitting and he not being sure if he wanted to be with me. It really scared me as i hadn't even told him about these dreams. Are they coming true??
Are the dreams all related or is it all this pregnancy making me dream like this.
I' also have alot more vivid and strange dreams such as my teeth feeling very loose and me being able to pull them out quite easily This dream didn't really seem to bother me, i seemed quite happy in this dream. What does all this mean??
Are pregnancy dreams different from yor normal dreams like when i wasn't pregnant.
Can anyone help please??
Thanks Dawny xxx